fix post stop hook not always called successfully #6424

Job	Run time
cross-i386	1m 20s
cross-i386 (runc_nodmz)	1m 14s
test (ubuntu-20.04, 1.21.x, rootless, -race)	7m 13s
test (ubuntu-20.04, 1.21.x, rootless)	6m 37s
test (ubuntu-20.04, 1.21.x, -race)	7m 53s
test (ubuntu-20.04, 1.21.x)	6m 57s
test (ubuntu-20.04, 1.22.x, rootless, -race)	7m 21s
test (ubuntu-20.04, 1.22.x, rootless)	6m 47s
test (ubuntu-20.04, 1.22.x, -race)	8m 12s
test (ubuntu-20.04, 1.22.x)	7m 12s
test (ubuntu-20.04, 1.22.x, criu-dev)	7m 46s
test (ubuntu-24.04, 1.21.x, rootless, -race)	9m 43s
test (ubuntu-24.04, 1.21.x, rootless)	9m 13s
test (ubuntu-24.04, 1.21.x, -race)	8m 8s
test (ubuntu-24.04, 1.21.x)	7m 23s
test (ubuntu-24.04, 1.22.x, rootless, -race)	9m 53s
test (ubuntu-24.04, 1.22.x, rootless)	9m 45s
test (ubuntu-24.04, 1.22.x, -race)	8m 37s
test (ubuntu-24.04, 1.22.x)	7m 57s
test (ubuntu-24.04, 1.22.x, runc_nodmz)	8m 1s
test (ubuntu-24.04, 1.22.x, criu-dev)	8m 13s
test (actuated-arm64-6cpu-8gb, 1.22.x, rootless)	11m 27s
test (actuated-arm64-6cpu-8gb, 1.22.x)	8m 36s
	2h 55m 28s

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